Miguel
New Member
I rebuilt the engine some months ago, rebuilt the carb too. But since the rebuilt the engine runs unstable at idle. I have to keep rpm above 2000rpm so the engine keeps running. When I try to reduce the idle it enters into a cycle where it goes up to 2200-2000rpm and down to 1600-1400 rpm and repeats. I posted a video running this cycle for reference () In the video you can see the afr readings. The idle screw seems to have no effect on the mixture/afr, readings do not change with idle screw. What is it ? 
It is driving me crazy.
I have checked many things but I will probably check them again following your recommendations....
Thanks all


I have checked many things but I will probably check them again following your recommendations....
Thanks all